The 1965 Armstrong 500 was the sixth running of the Bathurst 500 touring car race. It was held on 3 October 1965 at the Mount Panorama Circuit just outside Bathurst, New South Wales, Australia. The race was open to Australian assembled or manufactured vehicles and, for the first time, to imported vehicles, of which at least 100 examples and 250 examples respectively had been registered in Australia. Cars competed in four classes based on the purchase price of the vehicle in Australian pounds. Prize money was on offer only for class placings however the Armstrong Trophy was presented to the entrant of the outright winning car, this being the first time in the history of the event that there had been an official award for the outright winner.
The outright winning car was the Ford Cortina Mk.I GT500 entered by Fairfield Motors and driven by Barry Seton and emerging young driver Midge Bosworth. Second was the Grawill Motors entered Cortina driven mainly by Bruce McPhee with one lap driven by Barry Mulholland. Third, and one lap behind the two Cortina was the factory entered Morris Cooper S of Brian Foley and Peter Manton.
Class A was for cars under £920. It was contested by Datsun Bluebird, Fiat 850, 1.5 litre Ford Cortina 220, Morris Mini de Luxe and Vauxhall Viva, although all the Datsuns were withdrawn prior to race start due to wheel cracking failures.
The £1,301 to £2,000 class featured the first of what came to be known as the 'Bathurst specials', the Ford Cortina GT500 named for the race. The class also contained Fiat 2300, Humber Vogue, Studebaker Lark, Triumph 2000 and Volvo 122.
- Fastest Lap – #29 Brian Foley – 3:13.7 (lap record)
- Average Speed – 110 km/h
- Race time of first car home – 7:16:45.1
- Greenhalgh, David; Thomas B. Floyd; Bill Tuckey (2000). "1965 Ah-so; maybe next year". Australia's Greatest Motor Race 1960-1999 The first 40 years. Hornsby: Chevron Publishing Group Pty Limited. pp. 130–137 & 453. ISBN 1-875221-12-3.
- Australian Motor Manual, August 1965, page 4
- Official Entry List, Racing Cars News, October 1965, page 27
- Why Cortinas Win, Modern Motor, December 1965, pages 38 to 41 + 66 to 67
- Australian Motor Manual, December 1965, page 47